Please help quick! 3 questions if you answer all I will give brainliest 1. Identify at least two tools scientists use to study stars and galaxies, then explain how the tools you chose assist scientists in their work.

2. Name at least three properties of stars revealed by spectral characteristics

3. In 3-5 sentences, explain how a star is formed.

 1.Spectroscopes breaks the light from a single material into its component colors the way a prism splits white light into a rainbow. It records this spectrum, which allows scientists to analyze the light and discover properties of the material interacting with it.  

2.Optical Telescopes The now-indispensable optical telescope instrument was pioneered by Galileo Galilei in 1609, although others had created similar tools by then

2.A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.

3.Stars form from an accumulation of gas and dust, which collapses due to gravity and starts to form stars. The process of star formation takes around a million years from the time the initial gas cloud starts to collapse until the star is created and shines like the Sun.Once the pressure and the temperature inside get high enough for nuclear fusion to ignite, it creates a star.

Explanation:

unlike poles attract

this could be newton#'s law of cooling. the cooling curve is exponential